Character able to jump on slopes even though the state is disabled

Kinda just the issue stated above. What im creating is a vehicle chassis, and whenever they enter the seat I disable the jumping state. This works fine, however whenever the character is on an incline/wedge of some sort, the character jumps right out of the seat. Ive even tried setting the jump power to 0 but nothing seems to solve this issue. If anyone can help me that would be great! Thank you.